Position-sensitive transition edge sensor modeling and results

We report the latest design and experimental results for a Position-Sensitive Transition-Edge Sensor (PoST). The PoST is motivated by the desire to achieve a larger field-of-view without increasing the number of readout channels. A PoST consists of a one-dimensional array of X-ray absorbers connecte...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2004-03, Vol.520 (1-3), p.505-507
Main Authors: Hammock, Christina, Figueroa-Feliciano, Enectali, Apodaca, Emmanuel, Bandler, Simon, Boyce, Kevin, Chervenak, Jay, Finkbeiner, Fred, Kelley, Richard, Lindeman, Mark, Porter, Scott, Saab, Tarek, Stahle, Caroline
Format: Article
Language:English
Subjects:
Calorimeter
Constellation-X
Microcalorimeter
Position-sensitive
Spectrometer
X-ray
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Summary:We report the latest design and experimental results for a Position-Sensitive Transition-Edge Sensor (PoST). The PoST is motivated by the desire to achieve a larger field-of-view without increasing the number of readout channels. A PoST consists of a one-dimensional array of X-ray absorbers connected on each end to a Transition Edge Sensor (TES). Position differentiation is achieved through a comparison of pulses between the two TESs and X-ray energy is inferred from a sum of the two signals. Optimizing such a device involves studying the available parameter space which includes device properties such as heat capacity and thermal conductivity as well as TES read-out circuitry parameters. We present results for different regimes of operation and the effects on energy resolution, throughput, and position differentiation. Results and implications from a non-linear model developed to study the saturation effects unique to PoSTs are also presented.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2003.11.299